namespace Community.CsharpSqlite
{
	using sqlite_u3264 = System.UInt64;

	public partial class Sqlite3
	{
		/*
		** 2008 May 27
		**
		** The author disclaims copyright to this source code.  In place of
		** a legal notice, here is a blessing:
		**
		**    May you do good and not evil.
		**    May you find forgiveness for yourself and forgive others.
		**    May you share freely, never taking more than you give.
		**
		******************************************************************************
		**
		** This file contains inline asm code for retrieving "high-performance"
		** counters for x86 class CPUs.
		**
		** $Id: hwtime.h,v 1.3 2008/08/01 14:33:15 shane Exp $
		**
		*************************************************************************
		**  Included in SQLite3 port to C#-SQLite;  2008 Noah B Hart
		**  C#-SQLite is an independent reimplementation of the SQLite software library
		**
		*************************************************************************
		*/
		//#if !_HWTIME_H_
		//#define _HWTIME_H_

		/*
		** The following routine only works on pentium-class (or newer) processors.
		** It uses the RDTSC opcode to read the cycle count value out of the
		** processor and returns that value.  This can be used for high-res
		** profiling.
		*/
#if ((__GNUC__) || (_MSC_VER)) &&       ((i386) || (__i386__) || (_M_IX86))

#if (__GNUC__)

__inline__ sqlite_u3264 sqlite3Hwtime(void){
unsigned int lo, hi;
__asm__ __volatile__ ("rdtsc" : "=a" (lo), "=d" (hi));
return (sqlite_u3264)hi << 32 | lo;
}

#elif  (_MSC_VER)

__declspec(naked) __inline sqlite_u3264 __cdecl sqlite3Hwtime(void){
__asm {
rdtsc
ret       ; return value at EDX:EAX
}
}

#endif

#elif ((__GNUC__) && (__x86_64__))

__inline__ sqlite_u3264 sqlite3Hwtime(void){
unsigned long val;
__asm__ __volatile__ ("rdtsc" : "=A" (val));
return val;
}

#elif ( (__GNUC__) &&  (__ppc__))

__inline__ sqlite_u3264 sqlite3Hwtime(void){
unsigned long long retval;
unsigned long junk;
__asm__ __volatile__ ("\n\
1:      mftbu   %1\n\
mftb    %L0\n\
mftbu   %0\n\
cmpw    %0,%1\n\
bne     1b"
: "=r" (retval), "=r" (junk));
return retval;
}

#else

		//#error Need implementation of sqlite3Hwtime() for your platform.

		/*
		** To compile without implementing sqlite3Hwtime() for your platform,
		** you can remove the above #error and use the following
		** stub function.  You will lose timing support for many
		** of the debugging and testing utilities, but it should at
		** least compile and run.
		*/

		private static sqlite_u3264 sqlite3Hwtime()
		{
			return (sqlite_u3264)System.DateTime.Now.Ticks;
		}// (sqlite_u3264)0 ); }

#endif

		//#endif //* !_HWTIME_H_) */
	}
}